IWCE 2015 presentation. we explore here the suitability of a mode space tight binding algorithm to various iii-v homo- and heterojunction nanowire devices. we show that in iii-v materials, the number of unphysical modes to eliminate is very high compared to the si case previously reported in the literature. nevertheless, we demonstrate here the possibility to clean iii-v mode space basis from the unphysical modes and achieve a significant speed up ratio (>: ; 150×: ; ), while...